., the obama administration, nato now obviously very concerned about the regime of president assad potentially using chemical weapons, poison gas against its own people. here's the question, what is the difference killing civilians in syria with bombs from jet fighters or attack helicopters as opposed to using say poison gas or chemical warfare? >> that's a good question. in one sense in moral terms, there is no difference and almost 40,000 people have died in syria already. but i think the use of chemical weapons and poison gas, i think the fatalities would be very much greater. and it does cross a line. these aren't judgments that you can make in any scientific way. but i think what your administration, the international community is signaling to president assad, if you cross that line, there will be a strong reaction. >> those are tough words coming from president obama, from secretary of state hillary clinton, from the nato secretary-general today in brussels. but is that enough to president bahar al assad from using chemical weapons or is there something else the international community s